| 摘要 |
PURPOSE:To improve weld line following accuracy by picking up a weld line and a temp. distribution in the direction to cross it as images by an ITV camera and an infrared camera and composing the images to control to fit a temp. peak point to the weld line. CONSTITUTION:The ITV camera 1 and the infrared camera 2 are installed on the unwelding side of a weld zone 3, namely, the outside of a steel pipe 4. The camera 1 picks up the weld line 5 which is an edge butt part as an image from the outside and the camera 2 picks up the temp. distribution in the direction to cross the weld line 5 as an image and the images 6 and 8 are projected on CRTs 7 and 9 respectively. Both picture signals are inputted to an image mixing circuit 10 and the image composing processing is performed so that the image 6 passes through a peak point of the image 8 on a monitor TV 11 and welding equipment is driven and controlled by a CPU 12 by its composite signal. Since the weld line can be simply controlled regardless of a weld line state, the following accuracy of the weld line is improved and a control system is simplified.
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